Table 2.
Clinical and angiographic characteristics of acute myocardial infarction.
| Low K (<3.9) | Mid K (≥3.9, <4.3) | High K (≥4.3) | P value | |
|---|---|---|---|---|
| n = 92 | n = 92 | n = 92 | ||
| Time from chest pain to door (hr) | 3.9 ± 5.4 | 5.2 ± 6.4 | 6.8 ± 6.9* | |
| SBP on admission (mmHg) | 133 ± 30 | 137 ± 31 | 131 ± 35 | |
| HR on admission (mmHg) | 74 ± 20 | 74 ± 19 | 79 ± 27 | |
| Previous MI | 4 (4.35) | 7 (7.61) | 9 (9.78) | 0.359 |
| Preinfarction angina | 36 (39.1) | 36 (39.1) | 25 (27.2) | 0.146 |
| STEMI | 73 (79.3) | 70 (76.0) | 61 (66.3) | 0.111 |
| Anterior MI | 50 (54.3) | 42 (45.7) | 41 (44.6) | 0.347 |
| Killip > I | 17 (18.5) | 13 (14.1) | 27 (29.3) | 0.0318 |
| Coronary multivessel involvement (%) | 35 (38.0) | 33 (35.9) | 36 (39.1) | 0.898 |
| PG on admission (mg/dL) | 184 ± 84 | 169 ± 65 | 202 ± 114† | |
| WBC count on admission (/mm3) | 10685 ± 3383 | 9468 ± 3412* | 9998 ± 3477 | |
| Creatinine on admission (mg/dL) | 0.79 ± 0.59 | 0.81 ± 0.33 | 0.99 ± 0.90* | |
| Hemoglobin on admission (g/dL) | 14.0 ± 1.6 | 13.8 ± 2.1 | 13.6 ± 2.2 | |
| Potassium on admission (mEq/L) | 3.6 ± 0.2 | 4.0 ± 0.1* | 4.7 ± 0.6∗† | |
| Stent diameter implanted in culprit lesion (mm) | 3.17 ± 0.44 | 2.99 ± 0.41* | 2.92 ± 0.44* | |
| Stent length implanted in culprit lesion (mm) | 22 ± 9 | 26 ± 16 | 22 ± 9 | |
| TIMI grade 3 after PCI | 76 (82.6) | 73 (79.3) | 74 (80.4) | 0.849 |
| Peak CK | 3168 ± 2755 | 2322 ± 2035* | 2585 ± 3080 |
SBP: systolic blood pressure; HR: heart rate; MI: myocardial infarction; STEMI: ST-elevation myocardial infarction; PG: plasma glucose; WBC: white blood cell; TIMI: thrombolysis in myocardial infarction; PCI: percutaneous coronary intervention; CK: creatine phosphokinase. *P < 0.05 versus low K; † P < 0.05 versus mid K.